Abstract: Objective To investigate the prevalence and risk factors of prehypertension among community adults in Chongqing,so as to provide the scientific basis for prevention and control of hypertension.Methods A questionnaire survey was conducted among 59 264 residents more than 18 years old selected from a district of Chongqing city.The prevalence was calculated and the relevant risk factors were analyzed with logistic regression.Results The prevalence of prehypertension in the adults was 64.72% with higher prevalences in the adults of 35-44 years old(71.11%) and 25-34(70.52% ).Compared to the adults with normal blood pressure,the average age,the rate of smoking,the rate of alcohol drinking,body mass index(BMI),waist circumference(WC) and waist-hip ratio(WHR) were higher in the pre-hypertension group.The results of univariate and multivariate logistic regression suggested that age,smoking,WHR,WC and BMI were potential risk factors of prehypertension.For both men and women,obesity was an importanthigh-risk factors.Conclusion The prevalence of prehypertension in the adults of Chongqing is high.The government and professional institutes should pay attention to health education and promotion on hypertention.